小鼠髓系白血病M1细胞经IL-6诱导分化后一系列蛋白质点的表达量发生了变化,其中A点表达量显著增加。MALDI-TOF-MS的肽质量指纹谱鉴定表明A点为肿瘤蛋白D52(tumor protein D52,TP D52)。为进一步确认该结果,对A点进行了ESI-MS/MS分析,测...小鼠髓系白血病M1细胞经IL-6诱导分化后一系列蛋白质点的表达量发生了变化,其中A点表达量显著增加。MALDI-TOF-MS的肽质量指纹谱鉴定表明A点为肿瘤蛋白D52(tumor protein D52,TP D52)。为进一步确认该结果,对A点进行了ESI-MS/MS分析,测定了3个肽段的序列。Mascot数据库查询结果很肯定地表明该蛋白为TP D52,但只有两个肽段与之匹配。对未匹配肽段的序列分析表明它对应于TP D52N端1-10氨基酸MDRGEQGLLK,其中N端第1个氨基酸甲硫氨酸M发生了乙酰化。分析结果与M乙酰化的规律一致,即当第2个氨基酸是酸性氨基酸D或E时,M很容易发生乙酰化。本研究文首次报道了TP D52的N端乙酰化,其功能需要进一步研究。展开更多
基金Guizhou Province Ordinary Colleges and Universities Youth Science and Technology Talent Growth Project (Grant No. QJH-KY[2022]249, QJH-KY[2022]250)Science and Technology Fund of Guizhou Provincial Health Commission (Grant No. GZWKJ2022-464 and GZWKJ2022-466)+5 种基金the Basic Research Program of Guizhou Province,Guizhou Provience Science and Technology Foundation,China (Grant No. QKHJC-ZK[2021]YB553, QKHRCZK[2023]YB308, and QKHJC-ZK[2023]ZD035)Cultivation Project of National Natural Science Foundation of Guizhou Medical University (Grant No. 20NSP052)The Start-up Foundation for Doctors of Guizhou Medical University (Grant No. YJ2020-BK035)Provincial College Student Innovation,Entrepreneurship Training Program (Grant No. S202010660142)the Guizhou Provincial Scientific and Technologic Innovation Base (Grant No.[2023]003)the National Natural Science Foundation of China (Grant No. 22307026)。